devextreme
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HTML5 JavaScript Component Suite for Responsive Web Development
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JavaScript
/**
* DevExtreme (viz/series/line_series.js)
* Version: 19.2.6
* Build date: Thu Jan 30 2020
*
* Copyright (c) 2012 - 2020 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
"use strict";
var series = require("./scatter_series");
var chartScatterSeries = series.chart;
var polarScatterSeries = series.polar;
var objectUtils = require("../../core/utils/object");
var extend = require("../../core/utils/extend").extend;
var each = require("../../core/utils/iterator").each;
var vizUtils = require("../core/utils");
var mathUtils = require("../../core/utils/math");
var normalizeAngle = vizUtils.normalizeAngle;
var DISCRETE = "discrete";
var _map = vizUtils.map;
var _extend = extend;
var _each = each;
exports.chart = {};
exports.polar = {};
function clonePoint(point, newX, newY, newAngle) {
var p = objectUtils.clone(point);
p.x = newX;
p.y = newY;
p.angle = newAngle;
return p
}
function getTangentPoint(point, prevPoint, centerPoint, tan, nextStepAngle) {
var correctAngle = point.angle + nextStepAngle;
var cosSin = vizUtils.getCosAndSin(correctAngle);
var x = centerPoint.x + (point.radius + tan * nextStepAngle) * cosSin.cos;
var y = centerPoint.y - (point.radius + tan * nextStepAngle) * cosSin.sin;
return clonePoint(prevPoint, x, y, correctAngle)
}
function obtainCubicBezierTCoef(p, p0, p1, p2, p3) {
var d = p0 - p;
var c = 3 * p1 - 3 * p0;
var b = 3 * p2 - 6 * p1 + 3 * p0;
var a = p3 - 3 * p2 + 3 * p1 - p0;
return mathUtils.solveCubicEquation(a, b, c, d)
}
var lineMethods = {
autoHidePointMarkersEnabled: function() {
return true
},
_applyGroupSettings: function(style, settings, group) {
var that = this;
settings = _extend(settings, style);
that._applyElementsClipRect(settings);
group.attr(settings)
},
_setGroupsSettings: function(animationEnabled) {
var that = this;
var style = that._styles.normal;
that._applyGroupSettings(style.elements, {
"class": "dxc-elements"
}, that._elementsGroup);
that._bordersGroup && that._applyGroupSettings(style.border, {
"class": "dxc-borders"
}, that._bordersGroup);
chartScatterSeries._setGroupsSettings.call(that, animationEnabled);
animationEnabled && that._markersGroup && that._markersGroup.attr({
opacity: .001
})
},
_createGroups: function() {
var that = this;
that._createGroup("_elementsGroup", that, that._group);
that._areBordersVisible() && that._createGroup("_bordersGroup", that, that._group);
chartScatterSeries._createGroups.call(that)
},
_areBordersVisible: function() {
return false
},
_getDefaultSegment: function(segment) {
return {
line: _map(segment.line || [], function(pt) {
return pt.getDefaultCoords()
})
}
},
_prepareSegment: function(points) {
return {
line: points
}
},
_parseLineOptions: function(options, defaultColor) {
return {
stroke: options.color || defaultColor,
"stroke-width": options.width,
dashStyle: options.dashStyle || "solid"
}
},
_parseStyle: function(options, defaultColor) {
return {
elements: this._parseLineOptions(options, defaultColor)
}
},
_applyStyle: function(style) {
var that = this;
that._elementsGroup && that._elementsGroup.attr(style.elements);
_each(that._graphics || [], function(_, graphic) {
graphic.line && graphic.line.attr({
"stroke-width": style.elements["stroke-width"]
}).sharp()
})
},
_drawElement: function(segment, group) {
return {
line: this._createMainElement(segment.line, {
"stroke-width": this._styles.normal.elements["stroke-width"]
}).append(group)
}
},
_removeElement: function(element) {
element.line.remove()
},
_updateElement: function(element, segment, animate, animationComplete) {
var params = {
points: segment.line
};
var lineElement = element.line;
animate ? lineElement.animate(params, {}, animationComplete) : lineElement.attr(params)
},
_animateComplete: function() {
var that = this;
chartScatterSeries._animateComplete.call(that);
that._markersGroup && that._markersGroup.animate({
opacity: 1
}, {
duration: that._defaultDuration
})
},
_animate: function() {
var that = this;
var lastIndex = that._graphics.length - 1;
_each(that._graphics || [], function(i, elem) {
var complete;
if (i === lastIndex) {
complete = function() {
that._animateComplete()
}
}
that._updateElement(elem, that._segments[i], true, complete)
})
},
_drawPoint: function(options) {
chartScatterSeries._drawPoint.call(this, {
point: options.point,
groups: options.groups
})
},
_createMainElement: function(points, settings) {
return this._renderer.path(points, "line").attr(settings).sharp()
},
_sortPoints: function(points, rotated) {
return rotated ? points.sort(function(p1, p2) {
return p2.y - p1.y
}) : points.sort(function(p1, p2) {
return p1.x - p2.x
})
},
_drawSegment: function(points, animationEnabled, segmentCount, lastSegment) {
var that = this;
var rotated = that._options.rotated;
var forceDefaultSegment = false;
var segment = that._prepareSegment(points, rotated, lastSegment);
that._segments.push(segment);
if (!that._graphics[segmentCount]) {
that._graphics[segmentCount] = that._drawElement(animationEnabled ? that._getDefaultSegment(segment) : segment, that._elementsGroup)
} else {
if (!animationEnabled) {
that._updateElement(that._graphics[segmentCount], segment)
} else {
if (forceDefaultSegment) {
that._updateElement(that._graphics[segmentCount], that._getDefaultSegment(segment))
}
}
}
},
_getTrackerSettings: function() {
var that = this;
var defaultTrackerWidth = that._defaultTrackerWidth;
var strokeWidthFromElements = that._styles.normal.elements["stroke-width"];
return {
"stroke-width": strokeWidthFromElements > defaultTrackerWidth ? strokeWidthFromElements : defaultTrackerWidth,
fill: "none"
}
},
_getMainPointsFromSegment: function(segment) {
return segment.line
},
_drawTrackerElement: function(segment) {
return this._createMainElement(this._getMainPointsFromSegment(segment), this._getTrackerSettings(segment))
},
_updateTrackerElement: function(segment, element) {
var settings = this._getTrackerSettings(segment);
settings.points = this._getMainPointsFromSegment(segment);
element.attr(settings)
},
checkSeriesViewportCoord: function(axis, coord) {
if (0 === this._points.length) {
return false
}
var range = axis.isArgumentAxis ? this.getArgumentRange() : this.getViewport();
var min = axis.getTranslator().translate(range.categories ? range.categories[0] : range.min);
var max = axis.getTranslator().translate(range.categories ? range.categories[range.categories.length - 1] : range.max);
var rotated = this.getOptions().rotated;
var inverted = axis.getOptions().inverted;
return axis.isArgumentAxis && (!rotated && !inverted || rotated && inverted) || !axis.isArgumentAxis && (rotated && !inverted || !rotated && inverted) ? coord >= min && coord <= max : coord >= max && coord <= min
},
getSeriesPairCoord: function(coord, isArgument) {
var that = this;
var oppositeCoord = null;
var nearestPoints = this.getNearestPointsByCoord(coord, isArgument);
var needValueCoord = isArgument && !that._options.rotated || !isArgument && that._options.rotated;
for (var i = 0; i < nearestPoints.length; i++) {
var p = nearestPoints[i];
var k = (p[1].vy - p[0].vy) / (p[1].vx - p[0].vx);
var b = p[0].vy - p[0].vx * k;
var tmpCoord = void 0;
if (p[1].vx - p[0].vx === 0) {
tmpCoord = needValueCoord ? p[0].vy : p[0].vx
} else {
tmpCoord = needValueCoord ? k * coord + b : (coord - b) / k
}
if (this.checkAxisVisibleAreaCoord(!isArgument, tmpCoord)) {
oppositeCoord = tmpCoord;
break
}
}
return oppositeCoord
}
};
var lineSeries = exports.chart.line = _extend({}, chartScatterSeries, lineMethods, {
getPointCenterByArg: function(arg) {
var value = this.getArgumentAxis().getTranslator().translate(arg);
return {
x: value,
y: value
}
}
});
exports.chart.stepline = _extend({}, lineSeries, {
_calculateStepLinePoints: function(points) {
var segment = [];
var coordName = this._options.rotated ? "x" : "y";
_each(points, function(i, pt) {
var point;
if (!i) {
segment.push(pt);
return
}
var step = segment[segment.length - 1][coordName];
if (step !== pt[coordName]) {
point = objectUtils.clone(pt);
point[coordName] = step;
segment.push(point)
}
segment.push(pt)
});
return segment
},
_prepareSegment: function(points) {
return lineSeries._prepareSegment(this._calculateStepLinePoints(points))
},
getSeriesPairCoord: function(coord, isArgument) {
var oppositeCoord;
var rotated = this._options.rotated;
var isOpposite = !isArgument && !rotated || isArgument && rotated;
var coordName = !isOpposite ? "vx" : "vy";
var oppositeCoordName = !isOpposite ? "vy" : "vx";
var nearestPoints = this.getNearestPointsByCoord(coord, isArgument);
for (var i = 0; i < nearestPoints.length; i++) {
var p = nearestPoints[i];
var tmpCoord = void 0;
if (isArgument) {
tmpCoord = coord !== p[1][coordName] ? p[0][oppositeCoordName] : p[1][oppositeCoordName]
} else {
tmpCoord = coord === p[0][coordName] ? p[0][oppositeCoordName] : p[1][oppositeCoordName]
}
if (this.checkAxisVisibleAreaCoord(!isArgument, tmpCoord)) {
oppositeCoord = tmpCoord;
break
}
}
return oppositeCoord
}
});
exports.chart.spline = _extend({}, lineSeries, {
_calculateBezierPoints: function(src, rotated) {
var bezierPoints = [];
var pointsCopy = src;
var checkExtremum = function(otherPointCoord, pointCoord, controlCoord) {
return otherPointCoord > pointCoord && controlCoord > otherPointCoord || otherPointCoord < pointCoord && controlCoord < otherPointCoord ? otherPointCoord : controlCoord
};
if (1 !== pointsCopy.length) {
pointsCopy.forEach(function(curPoint, i) {
var leftControlX;
var leftControlY;
var rightControlX;
var rightControlY;
var prevPoint = pointsCopy[i - 1];
var nextPoint = pointsCopy[i + 1];
var xCur;
var yCur;
var x1;
var x2;
var y1;
var y2;
var lambda = .5;
var curIsExtremum;
var leftPoint;
var rightPoint;
var a;
var b;
var c;
var xc;
var yc;
var shift;
if (!i || i === pointsCopy.length - 1) {
bezierPoints.push(curPoint, curPoint);
return
}
xCur = curPoint.x;
yCur = curPoint.y;
x1 = prevPoint.x;
x2 = nextPoint.x;
y1 = prevPoint.y;
y2 = nextPoint.y;
curIsExtremum = !!(!rotated && (yCur <= prevPoint.y && yCur <= nextPoint.y || yCur >= prevPoint.y && yCur >= nextPoint.y) || rotated && (xCur <= prevPoint.x && xCur <= nextPoint.x || xCur >= prevPoint.x && xCur >= nextPoint.x));
if (curIsExtremum) {
if (!rotated) {
rightControlY = leftControlY = yCur;
rightControlX = (xCur + nextPoint.x) / 2;
leftControlX = (xCur + prevPoint.x) / 2
} else {
rightControlX = leftControlX = xCur;
rightControlY = (yCur + nextPoint.y) / 2;
leftControlY = (yCur + prevPoint.y) / 2
}
} else {
a = y2 - y1;
b = x1 - x2;
c = y1 * x2 - x1 * y2;
if (!rotated) {
if (!b) {
bezierPoints.push(curPoint, curPoint, curPoint);
return
}
xc = xCur;
yc = -1 * (a * xc + c) / b;
shift = yc - yCur;
y1 -= shift;
y2 -= shift
} else {
if (!a) {
bezierPoints.push(curPoint, curPoint, curPoint);
return
}
yc = yCur;
xc = -1 * (b * yc + c) / a;
shift = xc - xCur;
x1 -= shift;
x2 -= shift
}
rightControlX = (xCur + lambda * x2) / (1 + lambda);
rightControlY = (yCur + lambda * y2) / (1 + lambda);
leftControlX = (xCur + lambda * x1) / (1 + lambda);
leftControlY = (yCur + lambda * y1) / (1 + lambda)
}
if (!rotated) {
leftControlY = checkExtremum(prevPoint.y, yCur, leftControlY);
rightControlY = checkExtremum(nextPoint.y, yCur, rightControlY)
} else {
leftControlX = checkExtremum(prevPoint.x, xCur, leftControlX);
rightControlX = checkExtremum(nextPoint.x, xCur, rightControlX)
}
leftPoint = clonePoint(curPoint, leftControlX, leftControlY);
rightPoint = clonePoint(curPoint, rightControlX, rightControlY);
bezierPoints.push(leftPoint, curPoint, rightPoint)
})
} else {
bezierPoints.push(pointsCopy[0])
}
return bezierPoints
},
_prepareSegment: function(points, rotated) {
return lineSeries._prepareSegment(this._calculateBezierPoints(points, rotated))
},
_createMainElement: function(points, settings) {
return this._renderer.path(points, "bezier").attr(settings).sharp()
},
getSeriesPairCoord: function(coord, isArgument) {
var that = this;
var oppositeCoord = null;
var isOpposite = !isArgument && !this._options.rotated || isArgument && this._options.rotated;
var coordName = !isOpposite ? "vx" : "vy";
var bezierCoordName = !isOpposite ? "x" : "y";
var oppositeCoordName = !isOpposite ? "vy" : "vx";
var bezierOppositeCoordName = !isOpposite ? "y" : "x";
var axis = !isArgument ? that.getArgumentAxis() : that.getValueAxis();
var visibleArea = axis.getVisibleArea();
var nearestPoints = this.getNearestPointsByCoord(coord, isArgument);
var _loop = function(i) {
var p = nearestPoints[i];
if (1 === p.length) {
visibleArea[0] <= p[0][oppositeCoordName] && visibleArea[1] >= p[0][oppositeCoordName] && (oppositeCoord = p[0][oppositeCoordName])
} else {
var ts = obtainCubicBezierTCoef(coord, p[0][coordName], p[1][bezierCoordName], p[2][bezierCoordName], p[3][coordName]);
ts.forEach(function(t) {
if (t >= 0 && t <= 1) {
var tmpCoord = Math.pow(1 - t, 3) * p[0][oppositeCoordName] + 3 * Math.pow(1 - t, 2) * t * p[1][bezierOppositeCoordName] + 3 * (1 - t) * t * t * p[2][bezierOppositeCoordName] + t * t * t * p[3][oppositeCoordName];
if (visibleArea[0] <= tmpCoord && visibleArea[1] >= tmpCoord) {
oppositeCoord = tmpCoord
}
}
})
}
if (null !== oppositeCoord) {
return "break"
}
};
for (var i = 0; i < nearestPoints.length; i++) {
var _ret = _loop(i);
if ("break" === _ret) {
break
}
}
return oppositeCoord
},
getNearestPointsByCoord: function(coord, isArgument) {
var that = this;
var rotated = that.getOptions().rotated;
var isOpposite = !isArgument && !rotated || isArgument && rotated;
var coordName = isOpposite ? "vy" : "vx";
var points = that.getVisiblePoints();
var allPoints = that.getPoints();
var bezierPoints = that._segments.length > 0 ? that._segments.reduce(function(a, seg) {
return a.concat(seg.line)
}, []) : [];
var nearestPoints = [];
if (that.isVisible() && allPoints.length > 0) {
if (allPoints.length > 1) {
that.findNeighborPointsByCoord(coord, coordName, points.slice(0), allPoints, function(point, nextPoint) {
var index = bezierPoints.indexOf(point);
nearestPoints.push([point, bezierPoints[index + 1], bezierPoints[index + 2], nextPoint])
})
} else {
if (allPoints[0][coordName] === coord) {
nearestPoints.push([allPoints[0]])
}
}
}
return nearestPoints
}
});
exports.polar.line = _extend({}, polarScatterSeries, lineMethods, {
_sortPoints: function(points) {
return points
},
_prepareSegment: function(points, rotated, lastSegment) {
var preparedPoints = [];
var centerPoint = this.getValueAxis().getCenter();
var i;
lastSegment && this._closeSegment(points);
if (this.argumentAxisType !== DISCRETE && this.valueAxisType !== DISCRETE) {
for (i = 1; i < points.length; i++) {
preparedPoints = preparedPoints.concat(this._getTangentPoints(points[i], points[i - 1], centerPoint))
}
if (!preparedPoints.length) {
preparedPoints = points
}
} else {
return lineSeries._prepareSegment.call(this, points)
}
return {
line: preparedPoints
}
},
_getRemainingAngle: function(angle) {
var normAngle = normalizeAngle(angle);
return angle >= 0 ? 360 - normAngle : -normAngle
},
_closeSegment: function(points) {
var point;
var differenceAngle;
if (this._segments.length) {
point = this._segments[0].line[0]
} else {
point = clonePoint(points[0], points[0].x, points[0].y, points[0].angle)
}
if (points[points.length - 1].angle !== point.angle) {
if (normalizeAngle(Math.round(points[points.length - 1].angle)) === normalizeAngle(Math.round(point.angle))) {
point.angle = points[points.length - 1].angle
} else {
differenceAngle = points[points.length - 1].angle - point.angle;
point.angle = points[points.length - 1].angle + this._getRemainingAngle(differenceAngle)
}
points.push(point)
}
},
_getTangentPoints: function(point, prevPoint, centerPoint) {
var tangentPoints = [];
var betweenAngle = Math.round(prevPoint.angle - point.angle);
var tan = (prevPoint.radius - point.radius) / betweenAngle;
var i;
if (0 === betweenAngle) {
tangentPoints = [prevPoint, point]
} else {
if (betweenAngle > 0) {
for (i = betweenAngle; i >= 0; i--) {
tangentPoints.push(getTangentPoint(point, prevPoint, centerPoint, tan, i))
}
} else {
for (i = 0; i >= betweenAngle; i--) {
tangentPoints.push(getTangentPoint(point, prevPoint, centerPoint, tan, betweenAngle - i))
}
}
}
return tangentPoints
}
});